feat: added support for deploying local changes

[Dhruvkumar-Microsoft]

Purpose

This pull request introduces a new custom Azure Developer (AZD) configuration for deploying local code changes and updates the deployment guide to reflect the new workflow. The main focus is to provide a clear, repeatable process for deploying local modifications using custom configuration and infrastructure files.

Custom deployment configuration:

• Added azure_custom.yaml, a customizable AZD configuration file that enables building and deploying local code changes with placeholder container images and post-provision hooks.

Documentation updates:

• Updated the "Advanced: Deploy Local Changes" section in docs/DeploymentGuide.md to guide users through swapping configuration and infrastructure files (azure_custom.yaml and main_custom.bicep) before running azd up, replacing the previous Docker build script approach.

Does this introduce a breaking change?

• Yes
• No

Golden Path Validation

• I have tested the primary workflows (the "golden path") to ensure they function correctly without errors.

Deployment Validation

• I have validated the deployment process successfully and all services are running as expected with this change.

What to Check

Verify that the following are valid

• ...

Other Information

[Copilot]

Pull request overview

This PR introduces a “custom” AZD configuration + infrastructure template intended to enable deploying locally modified source code to Azure via azd up, and updates the deployment guide to describe the new workflow.

Changes:

• Added azure_custom.yaml to define AZD services that build/push local code as container images.
• Added infra/main_custom.bicep to support AZD service integration via azd-service-name tags and placeholder images.
• Updated docs/DeploymentGuide.md to document swapping config/infra files before running azd up.

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 7 comments.

File	Description
infra/main_custom.bicep	New custom Bicep template that provisions resources for “local changes” deployments and tags Container Apps for AZD integration.
azure_custom.yaml	New AZD config defining services + docker build/push behavior for local source changes.
docs/DeploymentGuide.md	Updates “Advanced” section to describe the new file-swapping workflow for local deployments.
azure.yaml	Minor formatting/indent fix in requiredVersions.

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